Collar sensor holder



FIG. 1 is a top, front, right-side perspective view of a collar sensor holder, showing my new design;

FIG. 2 is a bottom, rear, right-side perspective view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof. 

CLAIM I claim the ornamental design for a collar sensor holder, as shown and described. 